[Insight-users] Registration Algo

[Luis Ibanez]

Hi Narasinga,

Please do the following



1) Read the tutorial on Image Registration

http://www.itk.org/CourseWare/Training/RegistrationMethodsOverview.pdf



2) Read the chapter on Image Registration from the
    ITK Software Guide

     http://www.itk.org/ItkSoftwareGuide.pdf




The method you describe sounds pretty much like the BSpline
deformable registration illustrated in the example


        Insight/Examples/Registration/
                  DeformableRegistration4.cxx




3) ITK is N-Dimensional. In ITK you don't do registration
    slice by slice. Instead you use the native dimensionality
    of the datasets.




4) Validation is only possible in the context of

     3.1) A clinical application
     3.2) A defined set of image modalities
     3.3) A specific computation time allowable.

    Please let us know what your clinical application
    is, what are your image modalities and what are
    the time demands of your clinicians.




Regards,


     Luis




-----------------------
V Narasinga Rao wrote:

> Hi,
> 
> I have just written an algorithm which registers two images 
> (multi-modality) in Matlab and now i want to shift it to ITK, what is 
> the best way to do it. Also how to validate teh registration algorithm 
> that i ave written. It's absurd question, but since i am not from 
> medical field sp for me it's more important question.
> 
> 
> I would like you all to just have a look at my algo
> for each slice.
> 
> 1. Step 1. Find the region, do it for both images.
> 2. Step 2. Enclose the region with an rectangle, by little geometry the 
> scale and rotation parametr can be found out.
> 3. Step 3. Once you know the scaling and rotation factor apply this to 
> the second image.
> 4. Step 4. Now use curve fitting to fit the curve, thus allignment will 
> happen. 5. Step 5. One you have curve fitted now apply the original 
> images on this binary image and now calculate teh MI to find weather the 
> images are really registrable.
> 
> This entire process can take place for all the sslices in parallel way/
> 
> Currently it is implemented in matlab and has been giving output, 
> ofcourse no validation regarding the registration has been done.
> 
> 
> 
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